Process of riveting.



of modifications of the invention.

UNITED STATES* l Patented May-39,1905'.

PATENT 'OFFICE `Pudel-'rss oF BIVETING. I

' sPEcIFIcATioN forming para of Letters Paf-.ein No..79'1,sao, dated may so, 1905-.V l

Application filed annary .To all whom .it may concern.'- y

Be it known that I, JAMES M. DoDGE ,.a citizen of the United States, residin'g'inPhiladelphia, Pennsylvania, have invented certain Improvements in Processes of Rivetig,zof which rivets which are used as substitutes for studbolts where the" rivet passes entirely through one object and extends into a cavity inl another object, and the rivet is`so made that when a head is formed on one end of the rivet by a blow-or bypressure ahead will beformed .on the opposite end of the rivet within the In the accompanying drawings, Figure 1 is a sectional view showing the rivet in position to be driven into place. Fig. 2 shows a rivet driven in place, Fig. 3 is a sectional perspective. view of one form of rivet which I prefer to use. Fig. 4 is a view of a ball, being one -formlof expander. Figs. 5 and 6 are views .I will describe my invention in connection with a rivet-which is to be used for securing-a .4 plate onto a metallic body.`

. A is the metallic body; and Bis the plate. The plate has aholevb passing entirely it and is countersunk at b' in the presentv in-l stance. 'f

anydepthrequired and preferably having a;

conical basca. Within the hole is placed .au

expander C, inthe 'presentinstanc'ein. the formofaball. f.

D is al rivet-blank having 4a recess d inf'one end, form-ing Zend of the rivet is'somewhatless indiameter surface of the .plate B, as indicated in Fig. 1.`

When the rivet is headed by either hammer-I ing ory by pressure, both ends of the rivet will beheaded sigmultaneously, gthe flange at the through l an annular iiange d' The base-v dz of the recess is conical. The recess in thew iq, 1904. seria; No. 189.326,-

`lower end will be`fforced over the ball; enlarging the hole a at the base and condensing the metal around the hole, as indicated, in Fig. 2,A

at thesame time the metal 'ofthe rivet is also condensed, forming a head eat thelowerend.

forced undeiv theball, as indicated in Fig. 2,

so 'that itl w1ll be locked thereto, and as'the hole hasbeenenlarged and the head formed on the inner endof the rivet it will be very simultaneously with forming a head e at the, upper end, The Hanged of the rivet will be -di-licult to Withdraw ythe rivet, owing tothe /factthat it is irml`7 attached to the expand-v ing-ball. l

Different forms 'of expanders may be usedsuch, for instance, as that illustrated in Fig. 6, which illustrates an expander C", having conic'al ends c c and an annular Vrecess 0@ `The shape ofthe recessed end of the rivet may also be modified without departing from my invention-for instance, 'the flange may be made up of. aseries of segments d", as shown in Fig. 5, and. may instances.

,y I have illustrated in acompanion applica-v tion filed April 10, 1903, SerialNo. 151,990,

-fr Vimprovements 4in expansion rivets andv bolts,v several forms o f expanders and modi.- edform's ofrivets which canbe used in carrying out my invention.

I claim as inyinvention--fV 1. T he process herein described offorming r i vheads simultaneously on each end of va rivet a' is a hole in themetallic body'extendingto.;

blank, said processconsistin'gin first forming a hole entirely through one object andpartly' thrdughanother object, placing a looseexpander inthe hole in advaneeo the rivet, hammering -or pressingthe exposed end of the on eachfend of therivet-hlank, theexpander causingthe metal ofthe rivet-blank to conbe lat on. the end in some l riv't-blankso aste-simultaneously formahead l` 99 densev the metal in Awhich the hole` is made," y

wherebyithe hole is enlargedat this .pointso as.. to prevent the whdrawal f the rivetblank, substantially as'described; -f f 2. The process herein described of-rive'tin'g, said process consistingingmakingv a hole'entirely through one object and partly through another object, the holein the latter object.

being. an evenA diameter throughout, provid- IOO Aff

ing a rivet-blank with a recess inone end and an expander, the expander'being less 1n diameter than the rivet-blank but greater in diameter than the recess inthe blank, inserting the the hole and condensing the metal, substan- I0 tially as described.

VIn testimony whereof I have signed my name `to this specification in the presence of two subscribing witnesses.

JAMES M. DODGE.

Witnesses:

WLL. A. BARR, Jos. H. KLEIN. 

